When I used to have sleep apnea, I noticed that I had trouble eating a double double at In-N-Out. I couldn’t physically open my mouth big enough to get the hamburger in there. So, I would have to squeeze it in and it always ended up in a big mess. For the longest time, I thought that was normal. Eventually, I figured out that my jaw muscles were tight and needed to be relaxed. Recently, I remembered that when I was young, I had surgery on my mouth to remove four (4) impacted molars. The pressure and strain was so great, my jaw was traumatized and I couldn’t open my mouth properly for a couple of weeks. I found that using a mouth prop helped to stretch my jaw vertically and prevent my Sleep Apnea. I place them at the back of my mouth and relax my jaw muscles as they stretch. If you have this condition, you may need to stretch your jaw both horizontally and vertically.